Label rendered invisible in CI/CD Variable update window

Browser: Firefox 74.0

Dark-GitLab version: v0.57.1

Screenshot/gif:

Zrzut_ekranu_2020-04-8_o_09.31.33 Zrzut_ekranu_2020-04-8_o_09.31.45

Describe the issue (if necessary):

Go to any project Settings -> CI/CD -> Variables [Expand] -> Edit